Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11193418 | Double-cylinder internal combustion engine | Kangquan Guo, Junchang Zhang, Hongling Jin, Zhijie Liu | 2021-12-07 |
| 10895281 | Curved groove ball bearing without retainer | Kangquan Guo, Yaohua Hu, Wenjing Zhang, Fang Gu | 2021-01-19 |